Samsung 8GB kit ( 2 x 4GB ), 204-pin SODIMM, DDR3 PC3L-12800, 1600MHz ram memory module ( M471B5173EB0-YK0 x 2 ) Module Size: 8GB kit (4GBx2) Package: 204-pin SODIMM Feature: DDR3 PC3L-12800 Specs: DDR3 PC3L-12800  CL=11  Unbuffered  NON-ECC  DDR3-1600  1.35V